mpt_send_handshake_request(9)

💅 mpt_send_handshake_request(9) 💅

okay so this page is straight out of the Kernel API Manual, and the function is literally called mpt_send_handshake_request — yes bestie, we're sending MPT requests the old-school doorbell way. buckle up 🎀

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✨ NAME ✨

mpt_send_handshake_request — send an MPT request via the doorbell handshake method. that's the whole vibe. 🔔

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🌸 SYNOPSIS 🌸

int mpt_send_handshake_request (u8 cb_idx , MPT_ADAPTER *ioc , int
reqBytes , u32 *req , int sleepFlag );

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🦋 ARGUMENTS 🦋

• cb_idx — the handle of a registered MPT protocol driver. like, which driver is this coming from, bestie? 🫶
• ioc — pointer to the MPT_ADAPTER structure. the adapter in question, main character energy 💅
• reqBytes — size of the request, in bytes. count 'em 🔢
• req — pointer to the MPT request frame. the actual payload, slay ✨
• sleepFlag — use schedule if CAN_SLEEP, otherwise use udelay. pick your waiting game 😴

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💖 DESCRIPTION 💖

so this routine is used exclusively to send MptScsiTaskMgmt requests — because those ones are required to be sent via the doorbell handshake. no substitutions, no shortcuts, this is the only lane they get to use 🚪🔔 literally the VIP entrance.

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🔥 NOTE 🔥

bestie it is the caller's responsibility to byte-swap fields in the request that are greater than 1 byte in size. like, that's on you, not on this function. don't come for this routine when your endianness is a mess 😭

returns 0 for success, non-zero for failure 💀 (as always, zero is the good one here).

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👑 SEE ALSO 👑

kernel file ./drivers/message/fusion/mptbase.c — and honestly the whole extended friend group:

• mpt_get_cb_idx(9), mpt_is_discovery_complete(9), mpt_remove_dead_ioc_func(9), mpt_fault_reset_work(9)
• mpt_interrupt(9), mptbase_reply(9), mpt_register(9), mpt_deregister(9)
• mpt_event_register(9), mpt_event_deregister(9), mpt_reset_register(9), mpt_reset_deregister(9)
• mpt_device_driver_register(9), mpt_device_driver_deregister(9), mpt_get_msg_frame(9), mpt_put_msg_frame(9)
• mpt_put_msg_frame_hi_pri(9), mpt_free_msg_frame(9), mpt_add_sge(9), mpt_add_sge_64bit(9)
• mpt_add_sge_64bit_1078(9), mpt_add_chain(9), mpt_add_chain_64bit(9), mpt_host_page_access_control(9)
• mpt_host_page_alloc(9), mpt_verify_adapter(9), mpt_get_product_name(9), mpt_mapresources(9)
• mpt_attach(9), mpt_detach(9), mpt_suspend(9), mpt_resume(9)
• mpt_do_ioc_recovery(9), mpt_detect_bound_ports(9), mpt_adapter_disable(9), mpt_adapter_dispose(9)
• MptDisplayIocCapabilities(9), MakeIocReady(9), mpt_GetIocState(9), GetIocFacts(9)
• GetPortFacts(9), SendIocInit(9), SendPortEnable(9), mpt_alloc_fw_memory(9)
• mpt_free_fw_memory(9), mpt_do_upload(9), mpt_downloadboot(9), KickStart(9)
• mpt_diag_reset(9), SendIocReset(9), initChainBuffers(9), PrimeIocFifos(9)
• mpt_handshake_req_reply_wait(9), WaitForDoorbellAck(9), WaitForDoorbellInt(9), WaitForDoorbellReply(9)
• GetLanConfigPages(9), mptbase_sas_persist_operation(9), GetIoUnitPage2(9), mpt_GetScsiPortSettings(9)
• mpt_readScsiDevicePageHeaders(9), mpt_inactive_raid_list_free(9), mpt_inactive_raid_volumes(9), mpt_raid_phys_disk_pg0(9)
• mpt_raid_phys_disk_get_num_paths(9), mpt_raid_phys_disk_pg1(9), mpt_findImVolumes(9), SendEventNotification(9)
• SendEventAck(9), mpt_config(9), mpt_ioc_reset(9), procmpt_create(9)
• procmpt_destroy(9), mpt_print_ioc_summary(9), mpt_set_taskmgmt_in_progress_flag(9), mpt_clear_taskmgmt_in_progress_flag(9)
• mpt_halt_firmware(9), mpt_SoftResetHandler(9), mpt_Soft_Hard_ResetHandler(9), mpt_HardResetHandler(9)
• ProcessEventNotification(9), mpt_fc_log_info(9), mpt_spi_log_info(9), mpt_sas_log_info(9)
• mpt_iocstatus_info_config(9), mpt_iocstatus_info(9), fusion_init(9), fusion_exit(9)

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💌 sign-off time 💌

this lil masterpiece lives in ./drivers/message/fusion, and the page is dated October 2026 — future-proofed and fabulous, no cap 💜✨ 🎀

okay that's the whole page, go byte-swap responsibly, ily, bye 🦋🌸